Trotskyists are people who have read the books, who have understood them, who agree with them, and who act accordingly.
Trots are ... well, we all know about the Trots.
Somewhere between the two are Trotskyites.
I am not sure that I have ever met a Trotskyist. But the existence of Trotskyites and Trots means that they must exist, somewhere.
What if every Trotskyist, Trotskyite and Trot in Britain were to join the Labour Party, a party that now has over half a million members and which is continuing to grow exponentially?
What possible difference would it make?
I do not ask these questions rhetorically.